Supported silver nanoparticle and near-interface solution dynamics in a deep eutectic solvent

Hammons, Joshua A., Ustarroz, Jon, Muselle, Thibault, Torriero, Angel A. J., Terryn, Herman, Suthar, Kamlesh and Ilavsky, Jan 2016, Supported silver nanoparticle and near-interface solution dynamics in a deep eutectic solvent, Journal of physical chemistry c, vol. 120, no. 3, pp. 1534-1545, doi: 10.1021/acs.jpcc.5b09836.

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Title Supported silver nanoparticle and near-interface solution dynamics in a deep eutectic solvent
Author(s) Hammons, Joshua A.
Ustarroz, Jon
Muselle, Thibault
Torriero, Angel A. J.ORCID iD for Torriero, Angel A. J.
Terryn, Herman
Suthar, Kamlesh
Ilavsky, Jan
Journal name Journal of physical chemistry c
Volume number 120
Issue number 3
Start page 1534
End page 1545
Total pages 12
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2016-01-28
ISSN 1932-7447
Summary Type III deep eutectic solvents (DES) have attracted significant interest as both environmentally friendly and functional solvents that are, in some ways, advantageous to traditional aqueous systems. While these solvents continue to produce remarkable thin films and nanoparticle assemblies, their interactions with metallic surfaces are complex and difficult to manipulate. In this study, the near-surface region (2-600 nm) of a carbon surface is investigated immediately following silver nanoparticle nucleation and growth. This is accomplished, in situ, using a novel grazing transmission small-angle X-ray scattering approach with simultaneous voltammetry and electrochemical impedance spectroscopy. With this physical and electrochemical approach, the time evolution of three distinct surface interaction phenomena is observed: aggregation and coalescence of Ag nanoparticles, multilayer perturbations induced by nonaggregated Ag nanoparticles, and a stepwise transport of dissolved Ag species from the carbon surface. The multilayer perturbations contain charge-separated regions of positively charged choline-ethylene and negatively charged Ag and Cl species. Both aggregation-coalescence and the stepwise decrease in Ag precursor near the surface are observed to be very slow (∼2 h) processes, as both ion and particle transport are significantly impeded in a DES as compared to aqueous electrolytes. Altogether, this study shows how the unique chemistry of the DES changes near the surface and in the presence of nanoparticles that adsorb the constituent species.
Language eng
DOI 10.1021/acs.jpcc.5b09836
Field of Research 090499 Chemical Engineering not elsewhere classified
030606 Structural Chemistry and Spectroscopy
030604 Electrochemistry
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, American Chemical Society
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